Specially-shaped annular molding die and molding method for metal bars

Abstract

The invention discloses a specially-shaped annular molding die and a molding method for metal bars. The molding die comprises a pre-pressing die and an annular molding die, wherein the pre-pressing die comprises an upper die part and a lower die part; the upper die part comprises a die handle and an upper die; the shape of the upper die is determined according to the shape of a product to be processed; the lower die part comprises a lower template and a lower die; the middle of the lower die has a groove structure; the left and right ends of the lower die are provided with emptying grooves respectively; the outer end part of the emptying groove at one end is enclosed and the emptying groove is used for limiting the metal bars during first emptying; the emptying groove at the other end is straight through; the emptying grooves at the left and right ends are symmetrically distributed; and the structure of the annular molding die is basically the same as that of the pre-pressing die. Themetal bars are molded by pressing by using two sets of molds. Compared with the conventional manual forming way, the molding die and the molding method have the advantages of further improving the appearance quality of the product, realizing standardized manufacturing of the product, improving production efficiency, lowering production cost, along with simple and convenient technological operation.

Description

technical field [0001] The invention belongs to the technical field of material forming in mechanical plastic processing, and relates to a mold and a forming method for performing special-shaped annular forming of metal bars. Background technique [0002] In the field of industrial machinery processing, it is often necessary to process some metal parts that are closed rings as a whole. Parts of this shape are widely used in products in various industrial fields, such as semicircular hangers used on railway freight wagons. rings, square safety eyelets on the brake beam of the vehicle, etc. These annular parts can be arc-shaped, rectangular, conical, variable-prismatic or even wavy. [0003] At present, when domestic enterprises carry out special-shaped annular forming of metal bars, the processing method generally adopted is to heat the metal bars and then use tools to manually bend the forming method. This method is greatly affected by human factors, and the product accurac...

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Problems solved by technology

[0003] At present, when domestic enterprises carry out special-shaped annular forming of metal bars, the processing method generally adopted is to heat the metal bars and then use tools to manually bend the forming method. This method is greatly affected by human factors, and the product accuracy is often not up to the standard. To process design requirements, and low productivity

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